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49 lines
1.4 KiB
49 lines
1.4 KiB
// This file was extracted from the TCG Published |
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// Trusted Platform Module Library |
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// Part 3: Commands |
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// Family "2.0" |
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// Level 00 Revision 01.16 |
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// October 30, 2014 |
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#include "InternalRoutines.h" |
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#include "NV_ChangeAuth_fp.h" |
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// |
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// |
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// Error Returns Meaning |
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// |
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// TPM_RC_SIZE newAuth size is larger than the digest size of the Name algorithm for |
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// the Index referenced by 'nvIndex |
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// |
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TPM_RC |
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TPM2_NV_ChangeAuth( |
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NV_ChangeAuth_In *in // IN: input parameter list |
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) |
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{ |
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TPM_RC result; |
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NV_INDEX nvIndex; |
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// Input Validation |
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// Check if NV is available. NvIsAvailable may return TPM_RC_NV_UNAVAILABLE |
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// TPM_RC_NV_RATE or TPM_RC_SUCCESS. |
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result = NvIsAvailable(); |
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if(result != TPM_RC_SUCCESS) return result; |
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// Read index info from NV |
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NvGetIndexInfo(in->nvIndex, &nvIndex); |
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// Remove any trailing zeros that might have been added by the caller |
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// to obfuscate the size. |
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MemoryRemoveTrailingZeros(&(in->newAuth)); |
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// Make sure that the authValue is no larger than the nameAlg of the Index |
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if(in->newAuth.t.size > CryptGetHashDigestSize(nvIndex.publicArea.nameAlg)) |
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return TPM_RC_SIZE + RC_NV_ChangeAuth_newAuth; |
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// Internal Data Update |
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// Change auth |
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nvIndex.authValue = in->newAuth; |
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// Write index info back to NV |
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NvWriteIndexInfo(in->nvIndex, &nvIndex); |
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return TPM_RC_SUCCESS; |
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}
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